Current Projects

Wearable Multi-Sensor Unit for Remote Monitoring Physiological Parameters

Areas of Application:

• Wearable Heathcare
• Telemedicine
• Remote Patient Monitoring

Engineering Expertise involved:

This project focuses on a cost-effective wearable system for constant real-time measurement, processing and wireless transmission of biomedical data such as skin Temperature, Heart Rate (HR), Respiration Rate (RR) and Electrocardiogram (ECG) with required accuracy while withstanding acceptable degree of patient motion. The platform is intended for remote monitoring scenarios, including higher-risk patients who benefit from continuous observation, but the design approach is broadly applicable to connected health and telemedicine products.

Mounted on the upper arm, the unit performs data sampling, analog signal pre-conditioning and normalization, and wireless transfer via Bluetooth Low Energy (BLE) radio link to the base station and networked PC for further post processing and analysis. For immediate detection of abnormal data patterns (vital signs), initial data analysis will be performed in the host application at the base station, while more detailed evaluation can be executed on a server data management platform for further processing and review.

Analog Front-End (AFE) electronics is designed to sample and process ultra-low electrical potentials from skin for measuring biomedical data such as ECG and PPG. The signal pre-conditioning techniques involve signal denoising (i.e. active/passive versions of high-pass filters (HPF) and low-pass filters (LPF), baseline wandering stabilization, signal differentiating, automatic gain control, etc.).

The signal-processing approach includes denoising, filtering, gain control, synchronization, peak detection, segmentation, SNR estimation, and pattern-analysis support to improve data quality and help identify abnormal conditions earlier.